摘要
采用自组装法成功设计制备了石蜡@CaCO_(3)相变微胶囊,并研究了不同芯壁比对相变微胶囊性能的影响。通过扫描电子显微镜发现所得的微胶囊呈明显的球状,由X射线衍射曲线可以看出,颗粒壳体的结晶型为方解石型和球霰石型的一种混合性结晶型。其相变研究结果表明当芯壁比为1:1时,微胶囊的包封率和相变潜热达到最大,分别为73.7%和102.8 J/g。此时制备得到的微胶囊的热导率相对于石蜡芯材可提高414.8%。制备胶囊过程中,不同的芯壁比会影响微胶囊的结构形貌、包封率以及热学性能。综合测试结果表明:当微胶囊的芯壁比为1:1时,所得微胶囊的性能最佳。
Paraffin@CaCO_(3) phase change microcapsules were successfully designed and prepared by the self-assembly method.The effects of varied core-to-wall ratios on phase change microcapsules performance were examined.Scanning electron microscopy reveals that the microcapsules are spherical in form,the X-ray diffraction curves show that the crystalline type of the particle shell is a mixed phase of calcite and sphalerite.The results of the phase transition study show that the encapsulation rate and the latent heat of phase transition of the microcapsules reach the maximum 73.7%and 102.8 J/g,respectively,at a core-to-wall ratio of 1:1.The thermal conductivity of the prepared microcapsules is increased by 414.8%compared to the paraffin core.During the preparation of the capsules,different core-to-wall ratios affect the structural morphology,the encapsulation rate and the thermal properties of the microcapsules.The comprehensive test results show that the best performance of the microcapsules is obtained when the core-to-wall ratio is 1:1.
作者
刘心怡
王继芬
谢华清
LIU Xinyi;WANG Jifen;XIE Huaqing(School of resources and environmental engineering,Shanghai Polytechnic University,Shanghai 201209,China;Shanghai Engineering Research Center of Advanced Thermal Functional Materials,Shanghai 201209,China)
出处
《上海第二工业大学学报》
2021年第4期259-265,共7页
Journal of Shanghai Polytechnic University
基金
国家自然科学基金(51776116)资助。
关键词
相变微胶囊
热性能
石蜡
phase change microcapsules
thermal performance
paraffin
